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In Lesson 14 you learned how to use the MediaPlayerLauncher to play videos using the Windows Media Player. When you use the Windows Media Player to play a video, you are launching the player and deactivating your application while the player plays the video. To play the video without deactivating your application, you can add a MediaElement control to your page and play the video within the MediaElement control. MediaElement supports playing videos from a remote server as well as playing videos located on the phone.
To add a MediaElement control to a page, drag the MediaElement icon from the Toolbox onto the page: